The open source Bochs, VMware Workstation by VMware, Inc. and VirtualPC from Connectix are applications that virtualize or emulate the x86 hardware, allowing you to run multiple operating systems on top of a "host" operating system that these three applications run upon. This means that you will be able to run Linux or FreeBSD or other supported "guest" OSes under Windows, Linux (or Macintosh), inside a window or fullscreen. But which one delivers the best performance for the money? And what about the free Bochs?